Proof of concept: Huffman unpacker for Battletoads & Double Dragon (NES)

bt_huffman.c

#include <stdio.h>
#include "Charmap.h"
#include "text.h"
#include "Tree_1.h"
#include "Tree_2.h"

int main()
{

int i, j;
unsigned char offset = 0, chr, byte;
	for (j = 0; j < text_size; j++)
	{
		byte = text[j];
		for (i = 0; i < 8; i++){		
			offset = byte & 0x80 ? Tree_2[offset] : Tree_1[offset];			
			byte <<= 1;
			if (offset >= 0x80){
				chr = Charmap [offset - 0x80];
				printf("%c", chr);
				offset = 0;
			}
		}
	}
	getchar();

return 0;
}

Charmap.c

/*
  This file was autogenerated by raw2c.
Visit http://www.devkitpro.org
*/

const unsigned char Charmap[] = {
	0x20, 0x45, 0x54, 0x41, 0x4f, 0x53, 0x49, 0x4e, 0x52, 0x48, 0x4c, 0xa0, 0x55, 0x4d, 0x44, 0x42, 
	0x59, 0x43, 0x27, 0x21, 0x47, 0x57, 0x50, 0xfd, 0x46, 0x4b, 0x2c, 0x2e, 0x5a, 0x2d, 0x56, 0x2a, 
	0x80, 0xff, 0x82, 0x4a, 0x51, 0x3f, 0x92, 0x81, 0x58, 0x09, 0x06, 0xa9, 0xc0, 0x39, 0xc8, 0x85, 
	0xa3, 0xa1, 0x31, 0xa5, 0x40, 0xe0, 0xa8, 0xa4, 0x14, 0x22, 0xcc, 0x33, 0xd0, 0x0b, 0xd9, 0x08, 
	0xd2, 0xc7, 0xc5, 0xcd, 0xce
};
const int Charmap_size = sizeof(Charmap); 

Charmap.h

/*
  This file was autogenerated by raw2c.
Visit http://www.devkitpro.org
*/

//---------------------------------------------------------------------------------
#ifndef _Charmap_h_
#define _Charmap_h_
//---------------------------------------------------------------------------------
extern const unsigned char Charmap[];
extern const int Charmap_size;
//---------------------------------------------------------------------------------
#endif //_Charmap_h_
//--------------------------------------------------------------------------------- 

Makefile

# --- Project details -------------------------------------------------

PROJ    := bt_huffman
TARGET  := $(PROJ)

COBJS   := $(PROJ).o Charmap.o text.o Tree_1.o Tree_2.o

# --- Build defines ---------------------------------------------------

CC      := gcc
LD      := gcc

CFLAGS  := -Os -s -Wall
CFDEBUG	:= -ggdb -O0 -Wall


.PHONY : build clean run

# --- Build -----------------------------------------------------------
# Build process starts here!

build: $(TARGET).exe


# Compile (step 1)

$(PROJ).exe: $(COBJS)
	$(CC) $^ $(CFLAGS) -o $@

$(COBJS) : %.o : %.c
	$(CC) $(CFLAGS) -c $< -o $@



# --- Clean -----------------------------------------------------------

clean : 
	@rm -fv *.exe
	@rm -fv *.dll
	@rm -fv *.wcx
	@rm -fv *.o

# --- Run -----------------------------------------------------------
# Run app
run: 
	@echo "Do nothing 

#EOF

text.c

/*
  This file was autogenerated by raw2c.
Visit http://www.devkitpro.org
*/

const unsigned char text[] = {
	0x81, 0x30, 0x9b, 0xe6, 0xe2, 0xdd, 0xec, 0x1a, 0xd6, 0x45, 0x06, 0xb1, 0x74, 0x4e, 0xfd, 0x90, 
	0xe7, 0x20, 0xfa, 0x9c, 0x66, 0xba, 0x20, 0x82, 0xeb, 0x87, 0x9d, 0xd5, 0x8a, 0x14, 0x5d, 0x50, 
	0x93, 0x58, 0xdb, 0xcf, 0xce, 0x3b, 0x62, 0xfd, 0x90, 0x6e, 0x5c, 0x2d, 0x62, 0x76, 0xaf, 0x5f, 
	0xb4, 0x79, 0xfc, 0x71, 0xfe, 0x1c, 0x4a, 0xce, 0xdb, 0xc2, 0xbe, 0xff, 0x09, 0x0a, 0x14, 0x45, 
	0xc7, 0x9e, 0xb2, 0xdb, 0x6d, 0x65, 0xe6, 0x9c, 0x48, 0x99, 0xeb, 0xfc, 0x5b, 0xf6, 0xa1, 0x46, 
	0x15, 0x21, 0xd7, 0xcf, 0x7b, 0x94, 0xd9, 0x72, 0x96, 0xfd, 0x91, 0x86, 0xde, 0x7e, 0x75, 0x19, 
	0xbe, 0xe3, 0x65, 0xe1, 0x03, 0xbb, 0xcc, 0xaf, 0xcc, 0x2a, 0x43, 0xb9, 0xed, 0xb2, 0xf7, 0xb8, 
	0xb7, 0x5f, 0x26, 0x16, 0xfd, 0xcd, 0xed, 0x35, 0x63, 0xe5, 0xe3, 0x24, 0x52, 0x9d, 0x7d, 0x35, 
	0x8f, 0x6f, 0xd9, 0x19, 0xe7, 0x00, 0xca, 0xc1, 0xf9, 0xf9, 0xc5, 0x77, 0x50, 0x3c, 0xee, 0x27, 
	0xeb, 0x17, 0x1c, 0xb9, 0xc1, 0x39, 0x58, 0x3f, 0x3f, 0x3a, 0x16, 0x54, 0x05, 0xf1, 0x40, 0xed, 
	0x67, 0xe6, 0xfd, 0x90, 0xb2, 0xba, 0x26, 0xbd, 0x7f, 0xf1, 0x57, 0xe8, 0xfb, 0x9e, 0x4a, 0xec, 
	0x9f, 0x5f, 0xe6, 0xcb, 0x64, 0x5f, 0x14, 0x07, 0x27, 0x85, 0xd1, 0x3b, 0xf6, 0x45, 0xd6, 0x24, 
	0x52, 0x9d, 0x27, 0xf0, 0x60, 0x3f, 0x3f, 0x3a, 0x6b, 0xdf, 0xa9, 0x17, 0x70, 0x76, 0xb3, 0xf3, 
	0x2b, 0x56, 0x7c, 0xf7, 0xb9, 0x4d, 0x9c, 0xa4, 0x70, 0xfd, 0x91, 0xa6, 0x29, 0xf7, 0x08, 0x1d, 
	0xc5, 0x35, 0xf4, 0x2c, 0x5d, 0x1f, 0x7f, 0xca, 0x7e, 0xbf, 0xd7, 0x3a, 0x6b, 0xd8, 0x71, 0x7f, 
	0xab, 0x52, 0xa3, 0xbb, 0xcf, 0x9e, 0x75, 0xbd, 0xe8, 0xc2, 0xa3, 0x2a, 0xbf, 0xd9, 0x17, 0xd3
	
};
const int text_size = sizeof(text); 

text.h

/*
  This file was autogenerated by raw2c.
Visit http://www.devkitpro.org
*/

//---------------------------------------------------------------------------------
#ifndef _text_h_
#define _text_h_
//---------------------------------------------------------------------------------
extern const unsigned char text[];
extern const int text_size;
//---------------------------------------------------------------------------------
#endif //_text_h_
//--------------------------------------------------------------------------------- 

Tree_1.c

/*
  This file was autogenerated by raw2c.
Visit http://www.devkitpro.org
*/

const unsigned char Tree_1[] = {
	0x43, 0xc5, 0xc3, 0xc1, 0xbf, 0xbd, 0xbb, 0xb9, 0xb7, 0xb5, 0xb3, 0xb1, 0xaf, 0xad, 0xab, 0xa9, 
	0x0b, 0x09, 0x07, 0x05, 0x03, 0x01, 0xa7, 0x14, 0x12, 0x10, 0x0e, 0xa5, 0x15, 0xa2, 0x19, 0x17, 
	0x1b, 0xa1, 0x1e, 0xa0, 0x9e, 0x9c, 0x21, 0x22, 0x9a, 0x98, 0x97, 0x25, 0x26, 0x93, 0x27, 0x28, 
	0x8f, 0x8d, 0x8c, 0x2b, 0x2c, 0x8a, 0x2e, 0x87, 0x86, 0x31, 0x32, 0x84, 0x83, 0x35, 0x81, 0x38, 
	0x3a, 0x3c, 0x80, 0x3f, 0x41
};
const int Tree_1_size = sizeof(Tree_1); 

Tree_1.h

/*
  This file was autogenerated by raw2c.
Visit http://www.devkitpro.org
*/

//---------------------------------------------------------------------------------
#ifndef _Tree_1_h_
#define _Tree_1_h_
//---------------------------------------------------------------------------------
extern const unsigned char Tree_1[];
extern const int Tree_1_size;
//---------------------------------------------------------------------------------
#endif //_Tree_1_h_
//--------------------------------------------------------------------------------- 

Tree_2.c

/*
  This file was autogenerated by raw2c.
Visit http://www.devkitpro.org
*/

const unsigned char Tree_2[] = {
	0x44, 0xc4, 0xc2, 0xc0, 0xbe, 0xbc, 0xba, 0xb8, 0xb6, 0xb4, 0xb2, 0xb0, 0xae, 0xac, 0xaa, 0x0c, 
	0x0a, 0x08, 0x06, 0x04, 0x02, 0xa8, 0xa6, 0x13, 0x11, 0x0f, 0x0d, 0xa4, 0xa3, 0x1a, 0x18, 0x16, 
	0x1c, 0x1f, 0x1d, 0x9f, 0x9d, 0x20, 0x9b, 0x23, 0x99, 0x24, 0x96, 0x95, 0x94, 0x92, 0x91, 0x90, 
	0x8e, 0x29, 0x2a, 0x8b, 0x2d, 0x89, 0x88, 0x2f, 0x30, 0x85, 0x33, 0x34, 0x82, 0x36, 0x37, 0x39, 
	0x3b, 0x3d, 0x3e, 0x40, 0x42
};
const int Tree_2_size = sizeof(Tree_2); 

Tree_2.h

/*
  This file was autogenerated by raw2c.
Visit http://www.devkitpro.org
*/

//---------------------------------------------------------------------------------
#ifndef _Tree_2_h_
#define _Tree_2_h_
//---------------------------------------------------------------------------------
extern const unsigned char Tree_2[];
extern const int Tree_2_size;
//---------------------------------------------------------------------------------
#endif //_Tree_2_h_
//---------------------------------------------------------------------------------